#include <bits/stdc++.h>
#define dim 2000004
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char a[dim],b[dim];
vector <int> sol;
int nrsol,lun,i,la,lb,t[dim];
int main(){
   fin>>(a+1)>>(b+1);
   la=strlen(a+1);
   lb=strlen(b+1);
   for(i=2;i<=la;i++){
        while(lun!=0&&a[i]!=a[lun+1])
            lun=t[lun];
        if(a[lun+1]==a[i])
            lun++;
        t[i]=lun;
   }
   lun=0;
   for(i=1;i<=lb;i++){
         while(lun!=0&&b[i]!=a[lun+1])
            lun=t[lun];
        if(b[i]==a[lun+1])
            lun++;
        if(lun==la){
            nrsol++;
            if(nrsol<=1000){
                sol.push_back(i-la);
            }
            lun=t[lun];
        }
   }
   fout<<nrsol<<"\n";
   for(auto it:sol)
    fout<<it<<" ";

}